What color indicates the entrance to an apron on the taxiway lights?

The color that indicates the entrance to an apron on the taxiway lights is amber. Amber lights are used to signal caution and are commonly employed at critical points on an airfield, such as the transition areas where a taxiway meets an apron. This visual cue alerts pilots and vehicle operators to the presence of the apron, helping to ensure safe operations as they navigate these areas.

Amber lighting serves a crucial purpose in aviation safety by giving an advance warning about the proximity to an apron where aircraft are parked, serviced, or may be crossing the path of taxiing aircraft. Its distinct color helps prevent any confusion with other lights that serve different functions, emphasizing the need for operators to approach with caution and be prepared for dynamic activity in the area.